That is it. Reload your emacs config. Launch mu4e from Alt-x list. You will be presented with the mu4e main view which shows the key bindings for some of the most used operations, which I have listed below for the sake of completion.

Modify your email address and the outgoing mail server accordingly. You are ready to roll. Reload your emacs config and M-x mu4e to start working with your emails from both accounts. You can extend your emacs init file and .offlineimaprc to include more accounts accordingly.